CC Barite

Occurrence, Active

Commodities and mineralogy

Main commodities Ba
Other commodities Cu; Pb
Ore minerals barite; chalcopyrite; galena; pyrite
Gangue minerals chlorite; quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-1
Latitude 63.2138
Longitude -144.0589
Nearby scientific data Find additional scientific data near this location
Location and accuracy The CC Barite occurrence is located at an elevation of about 5,600 feet, 0.2 mile north-northwest of peak 6835 and 0.8 mile west-northwest of peak 6740 in the NW1/4 section 34, T. 17 N., R. 7 E., Copper River Meridian. The location is accurate.

Geologic setting

Geologic description

The CC Barite occurrence is in an exposure of the Drum unit; bedded barite is enclosed in quartz-sericite schist that contains sparse disseminated galena and chalcopyrite. This is the only occurrence of bedded barite that has been identified in the Delta mineral belt; it may represent an exhalative precipitate that accumulated peripheral to or capping a sulfide system. It was found during field checking of airborne electromagnetic anomalies that trace a graphitic schist unit below this barite occurrence (S.S. Dashevsky, written communication, 2003).
The Drum unit that hosts the CC Barite occurrence consists of white to pale gray-green, rusty weathering, quartz-sericite(-chlorite-pyrite) schist with minor gray to black carbonaceous phyllite and rare interbeds of chloritic phyllite. The schist commonly contains 1 to 5 percent quartz eyes but may contain more. The protoliths of the schist are about two-thirds of volcanic origin and one-third of sedimentary origin. The schist has a phyllitic parting in many places.
Geologic map unit (-144.061147494264, 63.2134236437568)
Mineral deposit model Kuroko massive sulfide (Cox and Singer, 1986; model 28a).
Mineral deposit model number 28a
Age of mineralization The enclosing Drum unit has been dated at the Devonian-Mississippian boundary on the basis of one SHRIMP U-Pb zircon age of 359 +/- 6 Ma determined at the DD South prospect (MH325) (Dashevsky and others, 2003).

Production and reserves

Workings or exploration There has only been surface sampling and mapping at this occurrence (S.S. Dashevsky, written communication, 2003).
Indication of production None

Additional comments

Unpublished data cited is available for viewing by contacting Grayd Resources Inc. in Vancouver, B. C., Canada (www.grayd.com), or Northern Associates Inc. in Fairbanks, Alaska.

References